Emulsifier EKS-EM for Hydrocarbon Emulsion Making

Technical Requirements TU 2413-035-53501222-2003

Purpose of Use

Emulsifier EKS-EM is designed to make hydrocarbon based emulsions used at drilling, completion and killing of the wells with extremely low reservoir pressure, for the wells with lost circulation, for leveling of injectivity profile of injection wells with the temperature of 70°С, and as a flow-diverting chemical at acidic stimulation and massive acidizing of production wells in terrigenous and carbonate reservoirs.

Emulsifier EKS-EM is a complex composition consisting of demulsifying components and additives for decreasing of freezing point and emproving of emulsion stability. Emulsifier EKS-EM grade A and EKS-EM grade V are ready-to-use emulsions containing hydrocarbon phase. Emulsifier EKS-EM grade B is a concentrated chemical for making the oil-based emulsion.

Application Area

Production wells with carbonate and sandstone reservoirs with watering level up to 60%.

Injection wells with carbonate and sandstone reservoirs with the injectivity of up to 700 m3/24 hours.

Killing of wells with abnormally low pressure.

Flow diverting at acidizing of the wells with large amounts of acid compound in carbonate fractured reservoirs with low formation pressure.

Properties of emulsifier EKS-EM

Grade

EKS-EM grade A

EKS-EM grade B

EKS-EM grade V

Appearance

Oily mobile liquid with the colour varying from light-brown to black, some smal precipitaion is allowed

Density at 20°С, g/cm3

0.80-0.86

Not more than 0.92

0.85-0.92

Concentration of main material by mass, %,
not less than

10

50

-

Freezing point, °С, not more than

Depends on the hydrocarbon phase

Minus 40

n/a

Properties of Hydrocarbon Emulsions Stabilized With EKS-EM

Depending on the type and the ratio of hydrocarbon phase and water, emulsifier EKS-EM allows to get stable hydrophobic emulsions with the density ranging from 950 to 1 300 kg/m3 with different viscosity and structural-and-rheological properties.

The emulsions are thermostable, no banding of water and organic phase is observed at the temperatures under 70 °C.

Customer Benefits of Hydrocarbon Emulsions Stabilized With EKS-EM

Emulsions are non-damaging for the reservoir.

Emulsion have high pumpability.

Use of the emulsions reduces the period of resumption of stable output of the wells after maintenance and repair works.

Selective performance (in contact with oil the emulsions are getting thinner and are carried through the formation, in contact with formation water the viscosity and structural characteristics of emulsions increase, it increases the resistance to the filtration of water and reduces the permeability of the zone).

Prolonged effect after the application.

Low consumption of emulsifier and hydrocarbon component.

Process Technique

For water component for the hydrophobic emulsions it is possible to use mineralized produced waters or brine solutions (NaCl, CaCl2, etc.).

For hydrocarbon component is it possible to use crude oil.

To select the optimal design of application and consumption of EKS-EM it is recommended to contact the specialists of Service & Sales Department of Polyex company.

Emulsifier EKS-EM is certified for the application in oil-and-gas field.